def transform(self, usage_info, block_structure):
user = usage_info.user
SplitTestTransformer().transform(usage_info, block_structure)
staff_access = has_access(user, 'staff', usage_info.course_key)
# If you have staff access, you are allowed access to the entire result list
if staff_access:
return
user_partitions = block_structure.get_transformer_data(
self, 'user_partitions')
if not user_partitions:
return
user_groups = get_user_partition_groups(usage_info.course_key,
user_partitions, user, 'id')
for block_key in block_structure.topological_traversal():
transformer_block_field = block_structure.get_transformer_block_field(
block_key, self, 'merged_group_access')
if transformer_block_field is None:
continue
access_denying_partition_ids = transformer_block_field.get_access_denying_partitions(
user_groups)
access_denying_reasons = []
access_denying_messages = []
for partition_id in access_denying_partition_ids:
access_denying_partition = get_partition_from_id(
user_partitions, partition_id)
if access_denying_partition:
user_group = user_groups.get(access_denying_partition.id)
allowed_groups = transformer_block_field.get_allowed_groups(
)[access_denying_partition.id]
access_denied_message = access_denying_partition.access_denied_message(
block_key, user, user_group, allowed_groups)
access_denying_reasons.append(
access_denying_partition.name)
if access_denied_message:
access_denying_messages.append(access_denied_message)
if access_denying_reasons and not access_denying_messages:
block_structure.remove_block(block_key, keep_descendants=False)
else:
if access_denying_reasons:
block_structure.override_xblock_field(
block_key, 'authorization_denial_reason',
access_denying_reasons[0])
if access_denying_messages:
block_structure.override_xblock_field(
block_key, 'authorization_denial_message',
access_denying_messages[0])
def transform_block_filters(self, usage_info, block_structure):
user = usage_info.user
result_list = SplitTestTransformer().transform_block_filters(
usage_info, block_structure)
staff_access = has_access(user, 'staff', usage_info.course_key)
# If you have staff access, you are allowed access to the entire result list
if staff_access:
return result_list
user_partitions = block_structure.get_transformer_data(
self, 'user_partitions')
if not user_partitions:
return [block_structure.create_universal_filter()]
user_groups = get_user_partition_groups(usage_info.course_key,
user_partitions, user, 'id')
for block_key in block_structure.topological_traversal():
transformer_block_field = block_structure.get_transformer_block_field(
block_key, self, 'merged_group_access')
access_denying_partition_id = transformer_block_field.get_access_denying_partition(
user_groups)
access_denying_partition = get_partition_from_id(
user_partitions, access_denying_partition_id)
if access_denying_partition:
user_group = user_groups.get(access_denying_partition.id)
allowed_groups = transformer_block_field.get_allowed_groups()[
access_denying_partition.id]
access_denied_message = access_denying_partition.access_denied_message(
block_key, user, user_group, allowed_groups)
block_structure.override_xblock_field(
block_key, 'authorization_denial_reason',
access_denying_partition.name)
block_structure.override_xblock_field(
block_key, 'authorization_denial_message',
access_denied_message)
group_access_filter = block_structure.create_removal_filter(
lambda block_key: (block_structure.get_transformer_block_field(
block_key, self, 'merged_group_access'
).get_access_denying_partition(
user_groups) is not None and block_structure.get_xblock_field(
block_key, 'authorization_denial_message') is None))
result_list.append(group_access_filter)
return result_list
def transform_block_filters(self, usage_info, block_structure):
user = usage_info.user
result_list = SplitTestTransformer().transform_block_filters(usage_info, block_structure)
user_partitions = block_structure.get_transformer_data(self, 'user_partitions')
if not user_partitions:
return [block_structure.create_universal_filter()]
user_groups = get_user_partition_groups(usage_info.course_key, user_partitions, user, 'id')
for block_key in block_structure.topological_traversal():
transformer_block_field = block_structure.get_transformer_block_field(
block_key, self, 'merged_group_access'
)
access_denying_partition_id = transformer_block_field.get_access_denying_partition(
user_groups
)
access_denying_partition = get_partition_from_id(user_partitions, access_denying_partition_id)
if not has_access(user, 'staff', block_key) and access_denying_partition:
user_group = user_groups.get(access_denying_partition.id)
allowed_groups = transformer_block_field.get_allowed_groups()[access_denying_partition.id]
access_denied_message = access_denying_partition.access_denied_message(
block_key, user, user_group, allowed_groups
)
block_structure.override_xblock_field(
block_key, 'authorization_denial_reason', access_denying_partition.name
)
block_structure.override_xblock_field(
block_key, 'authorization_denial_message', access_denied_message
)
group_access_filter = block_structure.create_removal_filter(
lambda block_key: (
not has_access(user, 'staff', block_key) and
block_structure.get_transformer_block_field(
block_key, self, 'merged_group_access'
).get_access_denying_partition(user_groups) is not None and
block_structure.get_xblock_field(block_key, 'authorization_denial_message') is None
)
)
result_list.append(group_access_filter)
return result_list